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Lease Obligations (Tables)
 12 Months Ended
Dec. 31, 2018
Leases [Abstract]  
Schedule of Future Minimum Lease Payments for Capitalized and Non-cancelable Operating Leases
The Company’s future minimum lease payments as of December 31, 2018 under capitalized leases and non-cancelable operating leases, with initial or remaining lease terms in excess of one year, were as follows:
໿
(in thousands)
 
Capitalized Leases
 
Operating Leases
Years ending December 31:
 
 

 
 

2019
 
$
1,099

 
$
15,123

2020
 
1,011

 
9,153

2021
 
736

 
6,997

2022
 
752

 
5,847

2023
 
752

 
5,095

Later years
 
5,990

 
7,707

Total minimum lease payments
 
10,340

 
$
49,922

Less: amounts representing imputed interest
 
(3,294
)
 
 
Present value of minimum lease payments
 
7,046

 
 
Less: current portion of capitalized lease obligations
 
(654
)
 
 
Capitalized lease obligations, excluding current portion
 
$
6,392